viirya commented on a change in pull request #28876:
URL: https://github.com/apache/spark/pull/28876#discussion_r443164908
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggUtils.scala
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@@ -148,7 +149,15 @@ object AggUtils {
case ne: NamedExpression => ne
case other => Alias(other, other.toString)()
}
- val distinctAttributes = namedDistinctExpressions.map(_.toAttribute)
+ // Ideally this should be done in `NormalizeFloatingNumbers`, but we do it
here because
+ // `groupingExpressions` is not extracted during logical phase.
+ val normalizednamedDistinctExpressions = namedDistinctExpressions.map { e
=>
Review comment:
If you are questioning about why we need to have named expressions here,
I think it is because we need these distinct expressions to be in the result
expressions in Aggregate physical operator. These result expressions are for
the output attributes.
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